Teeth-extractor



w. QU'NNINGTONQ Tooth-Extractor. No. 225,110. Patented Mar. 2,1880.

N. PETERS. PHOTO-UTHOQRAPIIER; WANWGTON. O. C-

UNITED. STATES PATENT OF ICE,

WILLIAM CUNNINGTON, OF ROGKPORT, MISSOURI.

TEETH-EXTRACTO R.

SPECIFICATION forming part of Letters Patent No. 225,110, dated March 2, 1880.

7 Application filed December 20, 1879.

To all whom it may concern:

Be it known that I, WILLIAM CUNNINGTON, of Rockport, in the county of Atchison and State of Missouri, have invented certain new anduseful Improvements in Foot-Power Tooth- Drawing Machines; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a perspective of my foot-power tooth-draw ing machine, and Fig. 2 is a sectional detail view.

My invention relates to a foot-power toothdrawing machine; and it consists in the construction of parts, as herein fully described, and particularly pointed out in the claims.

In the drawings, A designates a standard mounted 'upon a base, B, which is provided with elongated feet 0.

D designates a rod, which is mounted in the upper end of the standard A, and in practice it is adjusted in position within a hollow part of said standard by means of a set-screw, a. E is a foot-rest, which is connected with one of the feet 0 by asliding hinge, so as to accommodate its position to the position of the operator. F is a lever-bar, pivoted at one end to the base B, and provided at its free forked end with a pulley-block, f, and a pivoted foot-lever, f, formed with the curved ends f f the longer one, f being for the pressure of the operators foot, and the shorter one, f being arranged to act against the cord which passes round the pulley-block f when the longer end of said lever is depressed. Gris afoot-rest upon standard A, and is used for the operator to place one foot upon preparatory to depressing the foot-lever, thus maintaining the foot in a con venient position for instantaneous use.

The cord H is secured to the standard at I, and from thence passes aroundthe pulley-block Kof a weight, K, after which it passes around a pulley-block, K secured to the standard, and thence down through an opening in a guide-block, L, secured upon the standard A. After passing down through this guide-block it is carried round the pulley-block of the ledirectly to the inner end of the said arm, while the remaining pulley-block, O, is pivoted to a weighted arm, R, which is swiveled upon the end of arm Q.

The weight K forms a counterpoise for the pulley-block 0, whereby the forceps-holder may be the more readily moved by hand to various positions.

The arm Q is swiveled upon the rod D, so that it may be shifted up and down or around; and to secure it in place I form the rod with two or more lines of holes, D, and provide the arm with a spring, S, having on its end a pin, S, which is forced into one of said holes by spring-pressure.

During operation the operator secures forceps to the forceps-holder, which may have spring-jaws or any suitable means for such purpose, and then places one foot upon the rest E, to steady the machine, and his other foot upon the rest Gr.. After applying the forceps to the patients tooth, he slips his foot down from rest G upon the curved foot-lever, and thence, by depressing the same, the short curved arm of said foot-lever will press against the cord around pulley f to keep it from slipping, and the lever F will be brought down, thereby tightening up the cord between said lever and the forceps sufficiently to extract the tooth. After releasing the lever the weight will restore the cordto its normal position between said Weight and lever, and will also draw up the forceps-holder out of the way.

The forceps, during operation, may be placed in any required position, and may be turned round as required, while at the same time there will be a great strain upon them, owing to the depression of the lever by foot-pressure.

What I claim is- 1. In a machine for drawing teeth, the hinged sliding foot-rest E, connected with one of the pulley-block K foot-lever f pulley-f stand- 15 ard A, and arm Q, with pulleys N and O arranged substantially as set forth.

6. The arm Q,pulleys N and O,a'nd weighted swiveled arm upon the end of arm Q, as set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM G UNN INGTON.

WVitnesses:

J AGOB SANDERS, JAMES A. NEWELL. 

